Welcome To The Machine lyrics

I believe this song is about their experience with members of the music. But not only is it meant to be relevant to the music industry, but of society as a whole. They speak of their dreams to become huge a revolutionize music. The big players in the music industry didn't care about their progressive ideas and dreams. But pink floyd wanted to truly be different and to create their own unique sound. The industry just wanted them to conform and to sound like popular mainstream musicians before them. That's why they said "what did you dream? It's alright we told you what to dream. "
this is representative of society as a whole. The machine is the political-social-economic systems that are in place and accepted by society. Rather then promoting peoples personal goals and global ideals, the machine teaches people to be submissive and subservient. Just accept the system that was established in the past, we don't need to change anything, just ignore all the shortcomings- that's what society teaches people, or what it tells them to dream.